Apple has not in the past three decades really courted the capital E Enterprise market. They'll definitely sell to Enterprise customers and have Enterprise sales teams for big customers. But they're not and never have been Dell or HP.

Enterprise sales sucks. There's infinite amounts of politicking and glad handing and buyers will get all sorts of sweet brib..."sales dinners" then go with the cheapest option. Margins on hardware sucks and the only money is in support contracts. Apple instead invests in consumer sales/support primarily and all the other channels are side businesses.

Stuff like the Xserve existed mostly for Apple internal purposes and ended up being sold externally to goose the scale enough to make them not a huge loss. At one point a large percentage of the offices on Bubb road were packed with Xserves running portions of the iTunes Music Store and the Apple online store. More offices were packed with Xserves doing media ingest and encoding for iTMS. Just about every building had racks of them as build and file servers.